"The Outback" has no legal definition, gazetted boundary, or official name. It's a cultural-geographic concept: the remote, arid/semi-arid interior beyond the coastal settlement fringe—roughly 70% of the continent.
Australia's states/territories manage land. The Outback crosses WA, NT, SA, QLD, NSW. No single jurisdiction. "Rangelands," "Arid Zone," "Remote Australia" are policy terms. "Outback" is vernacular—born from 19th-century pastoralists' "out the back of beyond."
Indigenous Country (50,000+ years). Mineral wealth (iron, gold, uranium, lithium). Tourism icon. Climate frontier. The name carries myth, not bureaucracy.